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-rw-r--r--Objects/listobject.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 3108ab4f80..0cb1a85fb6 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -2683,7 +2683,7 @@ PyTypeObject PyList_Type = {
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
- Py_TPFLAGS_BASETYPE, /* tp_flags */
+ Py_TPFLAGS_BASETYPE | Py_TPFLAGS_LIST_SUBCLASS, /* tp_flags */
list_doc, /* tp_doc */
(traverseproc)list_traverse, /* tp_traverse */
(inquiry)list_clear, /* tp_clear */